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Alpha-Carotene, Plasma — Substance Concentration

Published: August 9, 2026Updated: August 16, 2026

This blood test measures the amount of alpha-carotene, a vitamin A precursor and antioxidant, in plasma.

Quick summary

["The result can help assess alpha-carotene levels and may provide information about nutrition, supplement use, or absorption."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
27078-5
Short code
A-Carotene Plas-sCnc
Synonyms
A-Carotene Plas-sCnc
Category
liver
Sample
plasma
Container
Lavender-top (EDTA) or Green-top (Heparin)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

What is this test?

This test measures alpha-carotene in plasma, the liquid part of blood. Alpha-carotene is a carotenoid that the body can convert into vitamin A and that also acts as an antioxidant.

Why might I need this test?

A clinician may order this test when assessing nutritional status, investigating symptoms related to vitamin A deficiency, or evaluating conditions that affect nutrient absorption. It may also be used in the context of supplement use.

How is the test performed?

A blood sample is collected, and the plasma is analyzed to determine the concentration of alpha-carotene. The test is generally performed in a laboratory.

How do I prepare for the test?

Special preparation is often not required, but follow any instructions provided by your clinician. Tell the healthcare team if you take vitamin, nutritional, or herbal supplements because they may affect the result.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Plasma Alpha-Carotene

Frequently asked questions

What does the test measure?
The test measures the concentration of alpha-carotene, a vitamin A precursor, in plasma. It is a laboratory blood test rather than a home test.
What can affect my alpha-carotene result?
Diet, supplement use, recent intake of carotenoid-rich foods, and conditions that affect fat absorption can influence the result. The healthcare team should consider these factors when interpreting it.
Do I need to fast before this test?
Fasting is not always required, but your clinician may request it in some circumstances. Follow the preparation instructions for your specific order.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy